power: smb-lib: Fix mutex acquisition deadlock on PD hard reset

Mutex acquisition deadlock can happen while cancelling cc_dettach
work during pd_hard_reset from the function usbin_plugin_hard_reset
_locked on vbus rise which is called in the same lock context that
we try to acquire in the cc_dettach work routine.
Check if cc_dettach work is running during pd_hard_reset and use
trylock instead of mutex_lock to prevent any deadlock if mutext is
already held.

Change-Id: I5530deb9e654d3d12ba1b4bc6876f36127a0d5a5
Signed-off-by: Umang Agrawal <uagrawal@codeaurora.org>